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From FixxYa I've tried this:
Make FT26 open and locate straps 1 to 8 on the "CONTROL UNIT". Now you
must close the following straps : 1, 3, 5, 7, 8. Close your FT26 and turn the
power on while keeping at the same time the "TONE" and "REV" depressed.

You can reprogram your "ARS" like in the OPERATING MANUAL page 21.
My choice was 136 to 180 MHZ in RX-TX and it work very good!
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I did the soldering straps : 1, 3, 5, 7, 8 (strap 9 and 10 are soldered from before)
Turned it on holding D/MR + T + REV for full reset (or T + REV for partial reset)
Then turned off and back on holding both MT and MHz to open up the freq range.
Turned off againand back on holding RPT/SET to set the ARS range, but it only give me 1 and 2
CH.1 135.000 Press [D/MR] Lower Rx limit
CH.2 174.000 Press [D/MR] Upper Rx limit

Some sites suggest remove solder on jumper pad 10, and not soldering jumper nr 5, as far as I can tell this is wrong.
But I'm not entirely sure.
I've tried either way and none work, but without jumper 5 I couldn't enter TX RX setting by holding RPT/SET and turning on.

No idea why realy.

It will operate as far as 140.000-150.000 only, outside that I get just "Err"
Freq is adjustable from 130.000 to 174.000 though.
The other radios I know some have DO work outside the 140.000-150.000 range.
I can't get my hands on 1 to actually see what is soldered, but someone opened his and told me 3, 7, 1 and 5 + 9 and 10 where soldered.

And what about jumper 2, 4 and 6, are they normally closed or open?
I'm pretty new to all this stuff, and google won't turn up any other results or guides for me.

Anyone have experience with the Yaesu FT-26 / FT26 / FT 26 and see that I've missed something obvious?